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Abstract：
This study addresses the challenges of biodiesel production costs and waste oil disposal by investigating the use of low-cost waste oil as a feedstock. The impact of heating temperature on biodiesel yield and trace metal levels is examined using response surface methodology (RSM). Optimal conditions for high biodiesel yields (95-98%) from canola oil are determined with a methanol/oil ratio of 12:1, 1 wt% catalyst, and 60-min reaction time. For crude bioglycerol, the optimal conditions involve a methanol/oil ratio of 4.25:1, 2.93 wt% catalyst, and 119.15-min reaction time. Elemental analysis reveals the presence of high-concentration metals like Cu and Zn and low-concentration ones such as Pb, As, Se, and Zr in both oil feedstocks and their respective biodiesel and bioglycerol products. The study demonstrates that thermal stress on canola oil significantly impacts biodiesel and bioglycerol yields and trace metal levels during the transesterification process. The findings contribute to enhancing cost-effectiveness and environmental sustainability in biodiesel production.
摘要：
本研究通过调查低成本废油作为原料的使用，解决了生物柴油生产成本和废油处理的挑战。使用响应面方法（RSM）检查了加热温度对生物柴油产率和痕量金属含量的影响。用12：1的甲醇/油比例，1wt％的催化剂确定了菜籽油高生物柴油产率（95-98％）的最佳条件，和60分钟的反应时间。对于粗甘油，最佳条件包括4.25:1的甲醇/油比例，2.93wt%的催化剂，反应时间119.15-min。元素分析表明存在高浓度的金属，如Cu和Zn和低浓度的金属，如Pb，As,Se,和Zr在两种油原料及其各自的生物柴油和生物甘油产品中。研究表明，在酯交换过程中，对菜籽油的热应力会显着影响生物柴油和双甘油的产量以及痕量金属水平。这些发现有助于提高生物柴油生产的成本效益和环境可持续性。
